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Commit 15c729347 was a couple bricks shy of a load: we need to ensure that expr->plan gets reset to NULL on any error exit, if it's not supposed to be saved. Also ensure that the stmt->target calculation gets redone if needed. The easy way to exhibit a problem is to set up code that violates the writable-argument restriction and then execute it twice. But error exits out of, eg, setup_param_list() could also break it. Make the existing PG_TRY block cover all of that code to be sure. Per report from Pavel Stehule. Discussion: https://postgr.es/m/CAFj8pRAeXNTO43W2Y0Cn0YOVFPv1WpYyOqQrrzUiN6s=dn7gCg@mail.gmail.com
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.